IsItAGoodCar
Reliability Guide

Common Problems with the
2018 BMW X4 (F26)

We've identified 3 known issues that can affect the 2018 BMW X4 (F26). 2 of these are serious faults that could be expensive to repair.

3
Known Issues
2
Serious
1
Moderate
0
Minor

All Known Issues

Transfer Case Judder

SeriousGearbox & Transmission

The ATC35L xDrive transfer case clutch pack is highly sensitive to rolling circumference differences between front and rear axles. Running non-star-marked or mismatched tyres causes shuddering and driveline snatch.

Est. Repair Cost: £1,000–£2,500
Warning Signs:

Hesitation or shudder under moderate acceleration between 20–40 mph, Stuttering or crabbing when turning tightly into parking bays, 4x4 and Drivetrain malfunction warnings

What to Inspect:
  • Check that all four tyres are identical brand and model with BMW star (*) marking
  • Measure tread depth differences across all four tyres (must be within 2mm)
  • Perform low-speed full-lock turns in both directions
Verified by IsItAGoodCar Research TeamUpdated

N47/B47 Timing Chain & EGR

SeriousEngine

Early 2014 models with N47 diesels carry rear timing chain stretch risks, while all diesel variants are affected by the critical BMW EGR cooler recall to prevent coolant leakage and intake fires.

Est. Repair Cost: £0–£2,500
Warning Signs:

Rattling metallic scraping sound from rear of engine on cold idle, Unexplained drop in coolant expansion tank level, Sweet burning smell through cabin air vents

What to Inspect:
  • Listen closely to rear engine bulkhead on cold start for chain slap
  • Verify BMW main dealer recall records for EGR cooler and intake replacement
Verified by IsItAGoodCar Research TeamUpdated
Official Recalls & Reference Documents:

Steering Rack Knock

ModerateSteering

The EPS steering rack develops internal mechanical play in the thrust piece bush, leading to a loose knocking sound transmitted directly through the steering column when driving over broken pavement.

Est. Repair Cost: £200–£1,200
Warning Signs:

Dull knocking felt in hands when negotiating low-speed potholes, Rattle when rocking steering wheel back and forth with engine off, Vague on-centre steering response

What to Inspect:
  • Rock steering wheel sharply left and right with engine idling to check for clunks
  • Ask if the official BMW steering rack thrust piece repair kit (part 32106891974) has been fitted
Verified by IsItAGoodCar Research TeamUpdated

Buying Tips for 2018 BMW X4 (F26)

  • Carefully check the xDrive transfer case for juddering or binding on tight, low-speed turns, often caused by mismatched tyres.
  • On the N47 20d diesel (early models), listen for timing chain rattle from the back of the engine on cold startup.
  • Test the rear visibility; the sloping roofline makes the rear window tiny, so ensure the reversing camera and parking sensors work perfectly.
  • Inspect the frameless-style windows to ensure they seal correctly against the roofline; wind noise is a common complaint.
  • Check the steering column for the infamous 'clunk' when wiggling the wheel, a widespread issue on this platform.
  • Verify the DPF isn't clogged on diesel models used purely for urban driving; look for warning lights or sluggish performance.
Check a 2018 BMW X4 (F26) by Registration